diff --git a/cli.php b/cli.php
index c13d5f5..bed43d0 100644
--- a/cli.php
+++ b/cli.php
@@ -160,9 +160,18 @@ $cli->run(); */
     }
 
     // TODO : Manage a parameter in the constructor of the class
-    $r = new $class;
-    $s = call_user_func_array(array($r, $method), $argv);
-    var_dump ($s);
+    try
+    {
+      $r = new $class;
+      $s = call_user_func_array(array($r, $method), $argv);
+      var_dump ($s);
+    }
+    catch (Exception $e)
+    {
+      file_put_contents("php://stderr", $e->getMessage()."\n");
+      if ($EXPERT)
+        file_put_contents ("php://stderr", $e->getTraceAsString()."\n");
+    }
     exit;
   }
 }